Runtime Console Health Check
Detect site-authored console errors and uncaught page errors during the rendered audit.
Check your websiteWhy this check matters
Runtime errors can silently break controls, analytics, personalization, or entire page sections. FreeScan separates actionable site errors from browser-generated resource noise.
Passing evidence
0 site-authored console errors · 0 uncaught page errorsCommon failing evidence
TypeError: Cannot read properties of undefined at checkout.js:42Possible false positives
- Browser extensions can inject unrelated errors.
- Third-party widget failures may require vendor ownership but can still affect users.
How to fix it safely
- Reproduce the first site-authored error with source maps enabled.
- Fix root causes before downstream cascade errors.
- Add an error boundary or fallback where external dependencies can fail.
How to verify the fix
- Reload and exercise the affected flow with a clean browser profile.
- Confirm no uncaught or site-authored errors recur.
Related Design checks
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Check this signal together with the related category evidence on the current public page.
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